freez: You can certainly make your own fuel rail if you have minimal skills and can make accurate measurements. Aluminum isn't too hard to work with and brass fittings can be found easily.
The problem exists when accumulating the tools for the job. If one has the access to the tools, or already owns them, then it shouldn't be that hard. If you have to buy the tools, even cheap ones, you are looking at more than the price of buying a fuel rail. Now, if you plan on being a DIY'er until you die then just buy the tools and get after it
Craig
www.zcarcreations.com